Yousab El Abah was an 18th-century Coptic Christian bishop and theologian who lived in Egypt. Born in the village of El Nikhela, he entered the Monastery of Saint Anthony in 1760 to pursue a monastic life. Known for his deep interest in researching manuscripts, he eventually rose to become the Bishop of Girga and Akhmim. He served as a personal secretary to Pope John XVIII, the Patriarch of Alexandria, and became a prominent defender of non-Chalcedonian doctrine during a period of attempted religious unification with Rome.